Stellantis may be looking to adapt planetary gear hybrid systems—like the one currently used in the Chrysler Pacifica Hybrid plug-in hybrid minivan—to more rugged vehicles, a patent filing indicates. The Pacifica Hybrid uses a planetary power-split system to juggle its 3.6-liter V-6 and a pair of electric motors, which can both be used as generators for propulsion. Problems like these likely contributed to the decision to use a different plug-in hybrid system in the Jeep Wrangler 4xe and Grand Cherokee 4xe plug-in hybrids. Such a system could prove useful in future Jeep hybrid and plug-in hybrid models, helping to maintain their off-road capability while perhaps improving efficiency over the current 4xe system. Those current 4xe plug-in hybrids have generally sold well, and Jeep is reportedly considering hybrids without charge ports to sell alongside them in the U.S.